Add support for CCDB_CACHE_ON option in CMakeLists

[RaiqaRasool]

This PR adds support for the CCDB_CACHE_ON CMake option by properly propagating it to the ccdb target via target_compile_definitions.

Previously, enabling the CCDB_CACHE_ON option at build time did not affect compilation because it wasn't forwarded to the compiler. This update adds the following logic to src/CCDB/CMakeLists.txt:

option(CCDB_CACHE_ON "Enable CCDB cache support" OFF)

if(CCDB_CACHE_ON)
    message(STATUS "Cache is ENABLED")
    target_compile_definitions(ccdb PUBLIC CCDB_CACHE_ON)
else()
    message(STATUS "Cache is DISABLED")
endif()

With this change, caching can be enabled at build time using:

cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=`pwd` -DCCDB_CACHE_ON=1

This ensures the cache logic is correctly compiled when the option is enabled.

[DraTeots]

Thank you so much for the changes!